NubraWeighted purchase price and total cost across multiple buys
What is it
A stock average calculator finds the weighted average price you paid for a stock when you've bought it more than once at different prices. It weighs each purchase by how many shares it covered, so a larger buy moves your average further than a smaller one, regardless of which purchase happened first.
Knowing this average cost, rather than just the price of your most recent purchase, lets you judge your true break-even point, compare it against the current market price, and decide whether to add to, hold, or exit a position.
Formula
Every purchase is multiplied by its quantity, those values are summed, then divided by the total number of shares across all purchases.
| Purchase | Buy price | Quantity | Value |
|---|---|---|---|
| Initial buy | Rs.500.00 | 100 | Rs.50,000 |
| Additional buy | Rs.400.00 | 200 | Rs.80,000 |
| Total | - | 300 | Rs.1,30,000 |
Rs.1,30,000 total value divided by 300 total shares gives a weighted average price of Rs.433.33, the calculator's default example above.
How to use it
Averaging strategies
The same weighted-average math powers two very different approaches to building a position.
Buy more shares as the price falls, pulling your average cost lower.
Buy more shares as the price rises, pushing your average cost higher.
Why it helps
Important
Average price describes what you paid; it does not indicate what a stock will do next. Any decision to add, hold, reduce or exit a position should consider your investment objective, diversification and risk tolerance.
FAQ
This calculator provides a weighted average from the purchase values you enter. It is an educational cost-basis tool and not investment advice.
Each buy price is multiplied by its quantity to get that purchase's value. Every purchase value is added together, then divided by the total number of shares bought, giving the weighted average price.
A simple average gives every purchase price equal importance. A weighted average gives larger purchases more influence, because more shares were bought at that price. This is the relevant cost basis for a holding.
No. This calculator uses only the purchase price and quantity you enter. Brokerage, taxes, exchange charges and other costs are not included in the average shown.
Yes. Use Add purchase for each additional buy at a different price. The calculator updates the average, total quantity and total invested amount instantly.
No. Averaging down can reduce the average purchase price, but it also increases the amount invested in the position. Assess the underlying business, portfolio allocation and your own risk limits before adding further capital.
The weighted-average math works for any asset bought in multiple quantities. For instruments with additional charges, exit loads or different settlement rules, use the result as a purchase-price reference rather than a complete profit-and-loss calculation.
It does not estimate future returns, current profit or loss, taxes, charges or whether to buy, sell or hold. It only calculates the weighted average of the purchases entered.